How do 9mm and .38 Special compare?
These are distinct cartridge designations, not interchangeable ammunition. Verify the exact ammunition designation against the firearm manufacturer's instructions. A cartridge category does not establish action type, capacity, or component compatibility.
This page does not infer a defensive use or rank a semi-automatic pistol against a revolver. Each comparison needs a stated criterion and evidence supporting that criterion.
Cost per round
Use 9mm FMJ listings and .38 Special FMJ listings to examine eligible tracked offers. Check exact product identity, package quantity, observation time, and the disclosed cost basis.
Divide each listed offer price by its round count. Delivered-cost comparisons additionally require known shipping and tax on the same basis. Unknown shipping does not establish a delivered-cost winner. Historical observations are not currently purchasable offers.
This page supplies no dated offer dataset establishing that .38 Special is the cheapest revolver category, that the price gap is small, or that hollow-point prices overlap. Production-volume and installed-firearm counts do not establish a specific retail-price result.
Ballistics and terminal-performance boundaries
A checkable comparison needs exact load identifiers, test barrels, ammunition lots, measurement methods, and conditions. Bullet mass and sourced velocity support energy arithmetic, not a universal expansion threshold or defensive outcome.
This page supplies no matched terminal-performance test supporting a pressure-category recommendation. It does not recommend +P ammunition for a snub-nose firearm or certify that an energy value guarantees expansion.
Verify the exact manufacturer's construction and performance claims separately. A caliber label alone does not establish +P compatibility; confirm permitted ammunition with the exact firearm manufacturer.
Capacity and reload measurements
Verify the exact firearm model, variant, magazine, chamber designation, and manufacturer specifications. A cartridge designation does not establish capacity or firearm dimensions.
This page supplies no matched stress-performance study establishing a universal defensive platform winner.
Reliability and equipment guidance
A platform name does not certify reliability, maintenance needs, or the cause and repair of a malfunction. Follow the exact equipment manufacturer's operation, inspection, and maintenance guidance.
This article provides no firearm-use or repair instructions.
Ammunition-substitution boundaries
The .357 Magnum category is a separate comparison category, not this site's authorization to fire .38 Special in a particular firearm. Verify permitted ammunition with the exact firearm manufacturer.
This page does not authorize every .38 Special load in every .38 Special firearm. It does not prescribe a practice-and-carry substitution or certify a most cost-effective revolver setup.
Comparing by a stated criterion
A comparison must disclose its criterion before naming a winner. Eligible offer arithmetic can establish a scoped cost-per-round result. Accuracy, recoil, reliability, and terminal performance require comparable evidence that this page does not supply.
Related comparisons
- 9mm vs .357 Magnum — 9mm vs the revolver's full-power option
- 9mm vs .45 ACP — The classic semi-auto caliber debate
- 9mm vs .380 ACP — Carry caliber comparison
Related caliber pages
- 9mm ammo prices — Eligible tracked listings
- Lowest observed 9mm prices — Historical statistics, not current offers
- 9mm price history — 30-day pricing trends
- .38 Special ammo prices — Eligible tracked listings
- Lowest observed .38 Special prices — Historical statistics, not current offers
- .38 Special price history — 30-day pricing trends
- .357 Magnum ammo prices — The .38 Special's big brother
- .38 Special +P listings — Pressure category, not compatibility authorization
Search 9mm by cost per round → | Search .38 Special by cost per round →